COURSE of the MONTH

Need help with accessing form elements

Hello,

I am using the script in the URL I provided.
I open a modal message, and I need to change some values in a form in the document that opened the modal message depending on selection I make within the modal window.
How do I do that?
Basically I am trying to do the same thing as wen trying to access elements of a parent window when using javascript:window.open(), however this does not work here.